21537928

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{643}}^1$

素因数の和:781

約数の個数: 32

約数和(自身を含む): 41731200

約数和(自身を除く): 20193272

約数列:

[1, 2, 4, 8, 53, 79, 106, 158, 212, 316, 424, 632, 643, 1286, 2572, 4187, 5144, 8374, 16748, 33496, 34079, 50797, 68158, 101594, 136316, 203188, 272632, 406376, 2692241, 5384482, 10768964, 21537928]

約数ペア:

[(1, 21537928), (2, 10768964), (4, 5384482), (8, 2692241), (53, 406376), (79, 272632), (106, 203188), (158, 136316), (212, 101594), (316, 68158), (424, 50797), (632, 34079), (643, 33496), (1286, 16748), (2572, 8374), (4187, 5144)]